摘要
针对离心风机叶片旋转造成风机运行噪声大等问题,以叶片表面结构作为研究对象,对叶片迎风面结构进行了声学性能仿真模拟,分析了叶片穿孔对离心风机声学性能的影响。首先,对叶片迎风面进行了穿孔处理,并使用FLUENT仿真软件探究了不同穿孔形状、不同穿孔直径、不同孔隙率对风机噪声的影响规律;然后,在叶片内部填充多孔介质材料后,讨论了其对风机声学性能的影响;最后,开展了原始叶片、叶片穿孔、叶片穿孔并填充材料的正交实验,通过实验对不同叶片穿孔结构的仿真结果的可靠性进行了验证。仿真结果表明:当穿孔形状为圆形、穿孔直径为1.5 mm、孔隙率为5%时,风机噪声降低了5.6%;叶片内部填充多孔介质材料后,能进一步降低风机噪声,相较原始叶片,降噪效果提升了9.1%,同时风机负压性能提升了11%。实验结果表明:叶片穿孔并填充材料能使降噪效果提升5.3%,风量提升7.5%。研究结果表明:对叶片表面结构进行穿孔、内部填充多孔材料的方式能有效降低风机噪声,所得结论可为离心风机的降噪处理提供参考。
Aiming at the problem of high noise generated by the rotation of centrifugal fan blades during operation,the windward surface structure of the blades was taken as the object of study,and the acoustic performance of the blades was simulated.The influence of blade perforation on the acoustic performance of centrifugal fan was analyzed.Firstly,the windward surface of the blade was perforated,and the effect of different perforation shapes,different perforation diameters,and different porosity on the fan noise was investigated using FLUENT simulation software.Then,the effect on the acoustic performance of the fan was discussed after the blade was filled with porous media material.Finally,orthogonal experiments of original blade,blade perforation,blade perforation and filling material were carried out,and the reliability of simulation results of different blade perforation structures was verified by experiments.The simulation results show that when the perforation shape is round,the perforation diameter is 1.5 mm,and the porosity is 5%,the fan noise is reduced by 5.6%.After the blade is filled with porous media material inside,it can further reduce the fan noise.Comparing with the original blade,the noise reduction effect is improved by 9.1%,and the negative pressure performance of the fan is improved by 11%.Experimental results show that blade perforation and material filling can increase the noise reduction effect by 5.3%and air volume by 7.5%.The research results show that the perforation of the blade surface structure and the inside filling of porous material can effectively reduce fan noise,and the conclusions obtained provide reference for the noise reduction treatment technology of centrifugal fans.
作者
陈波
李家春
何俊杰
徐娇
王永涛
CHEN Bo;LI Jia-chun;HE Jun-jie;XU Jiao;WANG Yong-tao(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;Guizhou Provincial Institute of Water Resources Sciences,Guiyang 550002,China)
出处
《机电工程》
CAS
北大核心
2023年第8期1267-1275,共9页
Journal of Mechanical & Electrical Engineering
基金
贵州省科技计划项目(黔科合支撑〔2022〕一般196)
贵州省科技厅项目(黔科合服企〔2021〕4号)。
关键词
通风机
离心风机
风机运行噪声
穿孔板
声学性能
多孔介质材料
fan
centrifugal fan
fan operation noise
perforated plate
acoustic performance
porous media materials
